Omega
Seamaster Diver 300M Co-Axial
212.30.41.20.03.001
Blue ceramic dial meets Co-Axial precision in a 41 mm dive-ready package.
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Overview
The Omega Seamaster Diver 300M Co-Axial reference 212.30.41.20.03.001 pairs a striking blue ceramic wave-pattern dial with the in-house Calibre 8500, Omega's first Co-Axial movement developed entirely within the manufacture. Housed in a 41 mm stainless steel case, it represents a significant technical and aesthetic evolution of the long-running Seamaster Diver 300M line. The combination of ceramic dial technology and the Co-Axial escapement placed this reference among the more technically ambitious sport watches of its era.
History
The Seamaster Diver 300M line traces its roots to 1993, when Omega relaunched the Seamaster as a modern professional diver. This 41 mm Co-Axial generation, introduced around 2012, marked the integration of Calibre 8500 — a movement that brought the Co-Axial escapement, free-sprung balance, and silicon balance spring to the Seamaster family for the first time. The reference remained in production through approximately 2018, after which the line was substantially redesigned. Among collectors, it is regarded as the definitive expression of the pre-2018 Seamaster Diver 300M in stainless steel.
Notable points
- Blue ceramic wave-pattern dial: the dial surface is crafted from ceramic, offering superior scratch resistance and long-term colour stability compared to lacquered or enamel alternatives.
- Calibre 8500: an in-house Co-Axial movement featuring a free-sprung balance wheel and a silicon balance spring, reducing the need for lubrication at the escapement and improving long-term rate stability.
- 41 mm stainless steel case: a size increase over earlier Seamaster Diver 300M references, reflecting the broader industry shift toward larger sport-watch proportions in the 2010s.
- 300-metre water resistance: the helium escape valve and screw-down crown maintain professional dive ratings consistent with the Seamaster Diver 300M's heritage.
- COSC-level precision: Calibre 8500 is certified to Master Chronometer standards' predecessor criteria, with Omega rating it to ±4 seconds per day — tighter than standard COSC chronometer tolerances.
Specifications
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